FERC Chairman Pat Wood is slated to meet within the next few days with Committee Chairman Bill Tauzin, R-La., and other leading Republicans on the panel to discuss the probe.

The commission last month ordered more than 150 companies to say whether they engaged in any of the trading strategies Enron used to take advantage of California's vulnerability during the power crunch.

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The agency launched the investigation after Enron revealed it had used strategies to create phony congestion on the state's electricity grid, ship power out of the state to circumvent price caps and rake in fees for relieving congestion it didn't really help alleviate.

After trading firms revealed they also had engaged in round-trip or wash trades to artificially boost trading volumes and revenues, regulators ordered industry participants to admit whether they engaged in these practices during the power crisis.

"It became clear Enron was not the only company scheming to manipulate the market," said Ken Johnson, a spokesman for the committee.

In coming weeks, the committee plans to hold hearings on these trading strategies. Eventually, lawmakers hope to pass some kind of legislation "to prevent some of these shenanigans from occurring," Johnson said.